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3 years ago

A. What is the reason why we use the order of operations?

Mathematics

1 answer:

Lina20 [59]3 years ago

4 0

It is very important when simplifying expressions and equations

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When converting measures, which is a true statement?

Keith_Richards [23]

Answer:subtract

Step-by-step explanation:

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3 years ago

Determine if the two figures are similar by using transformations.

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Yes they are similar look at the paper

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4 years ago

On a map, 1/8 inch represents 10 miles. What is the scale of the map in miles per inch?

nevsk [136]

Answer:

80 miles

Step-by-step explanation:

You would multiply 10 * 8 = 80 because 1/8 multiplied by 8 equals 1.

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3 years ago

Read 2 more answers

I need help on this it’s about trig identities

Cerrena [4.2K]

Answer:

The answer to your question is:

Step-by-step explanation:

1.-

$\frac{1 + sin\alpha }{cos\alpha } + \frac{cos\alpha }{1 + sin\alpha } = 2 sec\alpha$

$\frac{(1 + sin\alpha)^{2} + cos^{2} \alpha }{cos\alpha (1 + sin\alpha) }$

$\frac{1 + 2sin\alpha + sin^{2} \alpha+ cos^{2} \alpha }{cos\alpha + sin\alphacos\alpha }$

$\frac{2 + 2sin\alpha }{cos\alpha+ sin\alpha cos\alpha }$

$\frac{2(1 + sin\alpha) }{cos\alpha(1 + sin\alpha ) }$

$\frac{2}{cos\alpha }$

2sec $\alpha$

2.-

sec²x - tanxsecx

$\frac{1}{cos^{2}x } - \frac{sinx}{cosx} \frac{1}{cosx}$

$\frac{1}{cos^{2} x} - \frac{sinx}{cos^{2}x}$

$\frac{1 - sinx}{cos^{2}x }$

$\frac{1 - sinx}{1 - sin^{2}x }$

$\frac{1 - sinx}{(1 - sinx)(1 + sinx)}$

$\frac{1}{1 + sinx}$

3 0

3 years ago

How much does one case cost

nadya68 [22]

So for this we will be using a system of equations, with one equation representing Shakira's sales and the other representing Jeff's sales. Our equations are such (Let x = oranges and y = grapefruit)

$5x+8y=235\\ 3x+2y=85$

For this, I will be using the elimination method. So firstly, multiply both sides of the second equation by -4: $-12x-8y=-340$

Next, add 5x+8y=235 and -12x-8y=-340 to get -7x = -105 . From here we can solve for x.

For this, just divide both sides by -7, and your answer is going to be x = 15.

Now that we know what x is, just substitute x for 15 in either equation to solve for y. For this I will be using the second equation.

$3(15)+2y=85\\ 45+2y=85\\ 2y=40\\ y=20$

Since we know that oranges cost $15 and grapefruit cost $20, just add them together to get your answer, which is $35.

7 0

3 years ago